PTV won't be an issue with that cam, but it will be a dog down low with the stock stall TC.
I'd go with the ARP headbolts personally, but the GM bolts will be just fine. The 2003 block will have the long and short bolts.

 

the LQ4 will bolt right up to your new transmission

 

FWIW I run a 228r cam with a 3200 stall (wish it was a little bigger stall) and 3.73s in my DD 4.8 Silverado. Very very streetable and still get 16+ MPG. With that cam and a full exhaust, stock everything else, I put down 345hp/345tq to the wheels. I don't see how that 224r cam with some good heads on a 5.3 wouldn't make at least what I make.

 

ARP Bolts it is then!

 

Yeah i know but the Little Ole 4L60E wouldnt like it much lol.. I might do 6.0 4L80E in the future but not atm wanna see what i can do with what i got lol

 

power is power whether it comes from a heads/cam 5.3 or a stock lq4. all you're doing is getting your 5.3 up to the potential of a stock 6.0.

 

What Head Gaskets should i be running? I want the Cometic .40 but dont know the rest of the details.. bore size etc..

 

True i just dont want the trouble of a engine tranny swap atm.. What bore size head gaskets do i need to get with the 243 heads?

 

On my 5.3 I put MLS ls1 from TPS work fine.

 

Try to keep your bore size on your gaskets close to the true bore size of your motor. Any little crevice you create between the head and block mounting surface can dilute your mixture costing you a little power and causing increased emissions.